I've had a Windows-based system feeding data to FR24 for some years now and have recently (with encouragement from the site helpdesk) updated the Windows software to the latest version. It's running well, and I typically see about 370 aircraft a day.
I've set up a parallel Linux system running Mint 18 (with help from various people here), which uses the site version of dump1090 inclulded in the Linux download. Again, it's now running well, but sees only about 250 aircraft a day.
My question is, why the difference? The hardware set-up is identical on both systems, and while the two antennas have slightly different views of the sky, not enough to cause this sort of difference.
I'm suspecting it's something to do with the gain setting on the RTL-SDR dongle, but how to access this? Before I installed the site software, I had a version of dump1090 running which could set gain by a command line switch, but the site software won't run alongside this version, and I haven't found any documentatiion about its command line parameters, if any. Do these dongles store their gain settings in firmware, or does gain have to be set on every run of dump1090? I'm wondering if there is a way to set the gain, and then have the site feeding software running.
I've set up a parallel Linux system running Mint 18 (with help from various people here), which uses the site version of dump1090 inclulded in the Linux download. Again, it's now running well, but sees only about 250 aircraft a day.
My question is, why the difference? The hardware set-up is identical on both systems, and while the two antennas have slightly different views of the sky, not enough to cause this sort of difference.
I'm suspecting it's something to do with the gain setting on the RTL-SDR dongle, but how to access this? Before I installed the site software, I had a version of dump1090 running which could set gain by a command line switch, but the site software won't run alongside this version, and I haven't found any documentatiion about its command line parameters, if any. Do these dongles store their gain settings in firmware, or does gain have to be set on every run of dump1090? I'm wondering if there is a way to set the gain, and then have the site feeding software running.
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